A fourth-round selection by the Chargers in the 2009 NFL draft, Martin has spent four seasons in San Diego, starting 27 games over the past two years. He had his best campaign in 2011, tallying 47 tackles in 15 games.

Primarily playing defensive end in San Diego's 3-4 defensive scheme, Martin would be used as a rotational tackle in Detroit. He's a better run-stopper than pass-rusher, registering just three sacks and 10 quarterback hits in his career.